About the experimental group Control group, what is the experimental group What is the control group

First of all, as we all know, the growth and development of green plants are inseparable from light (this is the expected result - no light is poor, there is light growth), and then there is the division between the experimental group and the control group, which is the division of light and no light.

In layman's terms (my simple memory), in a controlled experiment, the variables studied are not normal in the experimental group, and in order to contrast with the experimental group (as opposed to the normal group), a normal group must be set up, which is the control group.

For example: ** The effect of light on the rat woman In the experiment, according to my understanding, the light is the test group and the non-light is the control group (because the rat woman generally lives in a dark environment, so .........

Green food is different from rat women, it needs light to grow, so the lightless (abnormal) is the experimental group, and the light is the control group.

So there are two answers: [experimental group no light (cultivated in the dark) growth is poor] and control group has light (cultivated under light) grows well].

i.e. and

But here there is only b).

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1 The results of the experimental group were previously unknown and could only be known through experiments. The control group is common sense that you know and don't need to experiment.

2 The experimental group is complex and has many variables, which must be studied by the "control variable method". Whereas the control group was simple and had hardly any variables.

The experimental group generally refers to abnormal conditions, while the control group generally refers to normal conditions.

Therefore, the control group was cultured in the light, which resulted in good growth, while the experimental group was cultured in the dark, which resulted in poor growth.

There is something wrong with the sofa, in fact, it does not mean that all experiments are to take abnormal experimental groups, that is determined according to the situation!

Analyzing the problem, it is not difficult to see that he actually wants to prove that it is only a "necessary" condition for the growth of plants, so we use the method of counterproof to prove it, in fact, the method of proving the necessary conditions in mathematics is often used to prove the necessary conditions. In this problem, we will take the exact same situation except for the light to be the experimental group, and the complete condition with light as the control group, so that we can get a perfect proof!

In fact, in the future, whenever you encounter biological experiments that need to prove the necessary conditions, the first thing you think of is to do the experimental group to refute the evidence!

Summary. Hello dear! <>

The so-called experimental group and control group are the nouns in the comparative experiment category in scientific experiments. For example, to verify the conjecture that sufficient water, air, and suitable temperature are required for seed germination, it can be verified using a controlled experiment using the control variable method. When verifying the appropriate temperature factor, two sets of experiments were done, and the two groups of experiments were the same except for the temperature condition, the experimental group was the group that maintained the appropriate temperature, and the control group was the group that was placed in a low temperature environment.

What is the experimental group What is the control group?

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Hello dear! <>

The so-called experimental group and control group are the nouns in the comparative experiment category in scientific experiments. For example, to verify the conjecture that sufficient water, air, and suitable temperature are required for seed germination, it can be verified using a controlled experiment using the control variable method. When verifying the appropriate temperature factor, two sets of experiments were done, and the two groups of experiments were the same except for the temperature condition, the experimental group was the group that maintained the appropriate temperature, and the control group was the group that was placed in a low temperature environment.

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1. The meaning is different.

In a controlled experiment, a controlled group of things is called the experimental group. In order to confirm that the results of the experimental group were caused by this treatment, it is necessary to use the same research object and set up a separate group of things that are not subject to the above treatment, and such a group of things that are not subjected to the experimental treatment is called the control group.

2. The objects are different.

The results of the experimental group are unknown and are obtained experimentally. And the control group is common sense that is known and knows without experimentation. The test group is complex and has many variables, which must be studied by the "control variable method".

3. Different ways.

The blank control group refers to the subjects who are not treated, and the treatment of the control group is not related to the experimental group. In fact, the control group still needed to do some, but the experimental group did not add the **factor. That is, compared to the experimental group, the other treatments were exactly the same as the experimental group, except for the experimental variables.

The blank control can clearly contrast and stimulate the changes and results of the experimental group, and enhance the persuasiveness.

In a biocomparative experiment (or controlled experiment), there is only one variable.

Among this variables, those who are close to real life are called the control group, and those who deviate from real life are called the experimental group.

Principle: "Experimental group" and "control group" are not clearly defined in biology, just like "sets" in mathematics, they are just a basic concept. You can understand it as:

The test group refers to the part of the trial that is carried out, and the control group refers to the part of the trial that is compared. In general, you can distinguish between the following two perspectives:

The results of the 1 experimental group were previously unknown and could only be known through experiments. The control group is common sense that you know and don't need to experiment.

2. The experimental group is complex and has many variables, which must be studied by the "control variable method". Whereas the control group was simple and had hardly any variables.

Here are three common control scenarios.

Blank control: that is, no treatment was given to the control group, or some experimental factors were administered to the control group, but not the experimental treatment factors studied; If the effect of thyroid hormone is to be verified, the control group of animals is not treated at all, let it grow naturally, and the experimental group is fed thyroid hormone preparation or thyroid suppressant to observe the effect of thyroid hormone;

Self-control: refers to the fact that both the experimental group and the control group are conducted on the same experimental subject. For example, in the experiment of plasma wall isolation and restoration of plant cells, the control group, i.e., the normal onion epidermal cells, and the experimental group, i.e., the cells isolated and restored from the plasma wall, were the same group of cells, which was a typical self-control experiment.

Mutual control: Instead of setting a separate control group, several experiments are controlled against each other. For example, in the experiment of "comparing catalase and Fe3+ catalytic efficiency", catalase and Fe3+ were used to catalyze the decomposition of hydrogen peroxide, respectively, and compared with each other to draw conclusions about the high efficiency of the enzyme.

An experiment always involves a control experiment (experimental group and control group). A controlled experiment (i.e., a comparative experiment) is a group of experiments conducted under different conditions (i.e., factors) and the same other conditions (factors), and the relationship between the conditions (factors) and the results is used to compare the group of experimental subjects is generally called the control group. Since the control group as a foil has a perceptual or theoretical understanding of the experimental process, results, and phenomena of the control group, it is said that the experimenter already knows the results of the control group before the actual experiment.

If it is found that the experimental results of the control group after the actual experiment are inconsistent with the previous results, it means that the experimental operation process is wrong, and the experiment is declared to have failed and must be redone; If the results of all the object groups in the experimental design are not clear to the experimenter, and then all the object groups are controlled experiments, we can judge the experimental group and the control group based on this. For example, in Example 1, in the experimental design, the experimental results of the ** group were based on a certain perceptual understanding (the experimental results were already clear), which was the control group and the shading group was the experimental group. In the same way, the experimental group and the control group in Examples 2 and 3 were the same as the answers.

This concept of determining the control experiment is consistent with the cognitive laws of the verification or experimental process, and at the same time, it can be integrated with the method of collecting and analyzing data and information in the scientific process, so it can be applied to all experiments.

An experimental group is a randomly selected subset of experimental subjects. Individuals in the experimental group received some kind of special treatment that was not available in the control group. Almost all well-designed experiments (and sometimes observational studies) have a control group and one or more experimental groups.

A control group is a randomly selected subset of subjects with no special treatment. The reason for the need for a control group is that without a control group, there is no way to determine whether this or some other variable (or several combined variables) has an effect.

An experimental group is a subset of randomly selected experimental subjects. Individuals in the experimental group received some kind of special treatment that was not available in the control group. Almost all well-designed experiments (and sometimes in the field) have a control group and one or more experimental groups.

What is not in nature, artificially created, and is subject to a single variable).

A control group is a randomly selected subset of subjects with no special treatment. The reason for the need for a control group is that without a control group, there is no way to determine whether this or some other variable (or several combined variables) is missing or not.

There are in the natural environment).